Title:
廃材を利用したホットメルト接着剤の製造方法
Document Type and Number:
Japanese Patent JP6979695
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing a hot melt adhesive obtained by chemical recycling of a waste material of polyurethane or an unsaturated polyester, especially a method capable of desirably recycling a waste material of a polyurethane-based composite material such as synthetic wood and the like or an unsaturated polyester-based composite material to be utilized as a resin molded product.SOLUTION: The method comprises: an amine decomposition step of making a waste material of polyurethane or a waste material of an unsaturated polyester into an amine decomposition product; an amic aid forming step of making the amine decomposition product into a polyurea-amic acid or a polyamide-amic acid; and an imidization step of making the polyurea-amic acid or the polyamide-amic acid into an imide compound. In the imidization step, the polyurea-amic acid or the polyamide-amic acid is thinly extended and heated. Preferably, a reaction temperature in the imidization step is adjusted to a temperature higher than a reaction temperature in the amic acid forming step.SELECTED DRAWING: Figure 2
Inventors:
Takao Kimura
Kazunori Fujii
Toshihiro Ihara
Kazunori Fujii
Toshihiro Ihara
Application Number:
JP2018084026A
Publication Date:
December 15, 2021
Filing Date:
April 25, 2018
Export Citation:
Assignee:
Ihara Gosei Co., Ltd.
International Classes:
C09J179/08; C08G73/10; C08J11/18; C09J11/08
Domestic Patent References:
| JP2011122079A | ||||
| JP2009084339A |
Other References:
真壁浩二,外2名,”発泡ポリウレタン廃材からのホットメルト接着剤の調製と評価”,廃棄物資源循環学会論文誌,一般社団法人廃棄物資源循環学会,2012年06月22日,Vol.23,No.3,p.138-143
Attorney, Agent or Firm:
Shunichi Yoshimura